Introduction- start with some recent news or with some line linking human progress and animal’s treatment
Body – give argument for how treatment of animals in a society can act a tool to measure Moral progress and greatness of nation -point out values like compassion, justice to voiceless, rule of law etc.
You can use some India specific arguments like Indian constitution (article 21- right to life also includes animals) and laws related to stop of cruelty against animal. Add some lines on clinical trails on animal.
Conclusion- concluding remarks can be on lines of importance of love towards animal